- Medicinal plants1
- Medicine, Magic, mystic, and spagiric1
- Medicine, Medieval1
- Medicine--Formulae, receipts, prescriptions1
- Meditations1
- Meistersinger1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Mendoza, Antonio de, approximately 1492-15521
- Mexico--Zumpango (Municipio)1
- Michele, Lorenzo de'1
- Michele, Olivo di1
- Middle East--Jerusalem (Latin Kingdom)1
- Middle East--Palestine1
- Miftāḥ al-ʻulūm (Sakkākī, Yūsuf ibn Abī Bakr)1
- Military policy1
- Military religious orders1
- Mineral industries1
- Mineralogy1
- Miners1
- Mines and mineral resources1